dc.creator | Cubero-Sesin, Jorge | |
dc.creator | Horita, Zenji | |
dc.date.accessioned | 2017-06-05T16:31:20Z | |
dc.date.available | 2017-06-05T16:31:20Z | |
dc.date.created | 2017-06-05T16:31:20Z | |
dc.date.issued | 2015-06 | |
dc.identifier | 10735623 | |
dc.identifier | https://hdl.handle.net/2238/7178 | |
dc.description.abstract | A cast Al-2 wt pct Fe alloy was processed by high-pressure torsion (HPT) at room temperature and then subjected to artificial aging at temperatures of 373 K and 473 K (100 °C and 200 °C). The aging behavior was studied by Vickers microhardness measurements and by microstructural analyses using transmission electron microscopy and X-ray diffraction. The initial intermetallic structures, composed of a mixture of Al + Al6Fe and Al + Al3Fe eutectics phases, were partially dissolved in the matrix up to a supersaturation of ~1 wt pct Fe. The microstructure was refined by HPT to an ultrafine-grained level with a minimum grain size of ~120 nm in the matrix and a dispersion of particles less than 400 nm. Age hardening was achieved within 0.25 hours at 473 K (200 °C), to a maximum UTS of ~700 MPa as a result of nano-sized precipitation within the ultrafine grains. The uniform elongation exceeded ~12 pct even at intermediate levels of imposed strain by HPT, while it decreased to ~6 pct with the subsequent aging treatment. The thermal stability of the ultrafine-grained structure was verified to exceed 16 days at 373 K (100 °C) and 12 hours at 473 K (200 °C). © 2015, The Minerals, Metals & Materials Society and ASM International. | |
dc.language | eng | |
dc.publisher | Springer Boston | |
dc.rights | https://creativecommons.org/licenses/by-nc/3.0/cr/ | |
dc.rights | Attribution-NonCommercial 3.0 Costa Rica | |
dc.source | Metallurgical and Materials Transactions A June 2015, Volume 46, Issue 6, pp 2614–2624 | |
dc.subject | Aleaciones | |
dc.subject | Termodinámica | |
dc.subject | Hierro | |
dc.subject | Difracción | |
dc.subject | Torsiones | |
dc.subject | Rayos X | |
dc.subject | Research Subject Categories::TECHNOLOGY::Materials science::Other processing/assembly | |
dc.title | Age Hardening in Ultrafine-Grained Al-2 Pct Fe Alloy Processed by High-Pressure Torsion | |
dc.type | info:eu-repo/semantics/article | |